The angle formed between the line of pull of a muscle and the longitudinal axis of the bone in which the muscle is acting. The line of pull is usually indicated by the joint angle. It affects the strength of muscle action; at only certain angles of pull can a muscle exert maximal tension.
A. Density increases
The density of planet earth is the lowest at the surface and increases the further you move to the middle.
The answer to this question is prediction
Mark's dog ran 3 4 of a mile in 1 4 of an hour. Compute the unit rate from the complex fraction 3 4 1 4 miles per hour.